Depressurizing device

Abstract

A depressurizing device includes a valve base, a first valve, a flexible member, and a top cover. The valve base has a pressure chamber and an outgassing chamber. Top and bottom surfaces of the pressure chamber have an opening and a first valve port respectively. The first valve is located in the pressure chamber and covers the first valve port. The flexible member is disposed on the valve base and has a depressurizing valve and a first outgassing port, the depressurizing valve covers the opening, and the first outgassing port is communicated with the outgassing chamber. A first outgassing channel is at least formed on the flexible member and communicates the pressure chamber to the outside of the valve base. The top cover is disposed on the flexible member and has a first depressurizing port and a second outgassing port.

What is claimed is: 
     
       1. A depressurizing device comprising:
 a valve base having a pressure chamber and an outgassing chamber, wherein top and bottom surfaces of the pressure chamber have an opening and a first valve port respectively, and a bottom surface of the outgassing chamber has a second valve port; 
 a first valve located in the pressure chamber and covering the first valve port; 
 a flexible member disposed on the valve base and having a depressurizing valve and a first outgassing port, the depressurizing valve covering the opening, the first outgassing port being communicated with the outgassing chamber, wherein a first outgassing channel is at least formed on the flexible member and formed on an uppermost surface of the valve base for communicating the pressure chamber to an outside of the valve base; and 
 a top cover disposed on the flexible member and having a first depressurizing port and a second outgassing port, the first depressurizing port facing the depressurizing valve, and the second outgassing port being communicated with the first outgassing port, wherein the depressurizing valve is configured to deform caused by an effect of atmosphere in the pressure chamber, so as to selectively close the first depressurizing port or leave the first depressurizing port to form a second outgassing channel between the top cover and the flexible member, and the second outgassing channel is communicated with the first depressurizing port and the second outgassing port. 
 
     
     
       2. The depressurizing device of  claim 1 , further comprising:
 a second valve located in the outgassing chamber and covering the second valve port. 
 
     
     
       3. The depressurizing device of  claim 1 , wherein a cross-sectional area of the first outgassing channel is in a range from 1×10 −3  mm 2  to 1 mm 2 . 
     
     
       4. The depressurizing device of  claim 1 , wherein the flexible member has a first trench, the valve base has a second trench, and the first trench and the second trench form the first outgassing channel. 
     
     
       5. The depressurizing device of  claim 1 , wherein the first outgassing channel penetrates the flexible member. 
     
     
       6. The depressurizing device of  claim 1 , wherein the valve base has a third outgassing channel communicating the pressure chamber to the outside of the valve base. 
     
     
       7. The depressurizing device of  claim 6 , wherein the sum of a cross-sectional area of the first outgassing channel and a cross-sectional area of the third outgassing channel is in a range from 1×10 −3  mm 2  to 1 mm 2 . 
     
     
       8. The depressurizing device of  claim 1 , wherein the valve base has a third outgassing channel communicating the pressure chamber to the outgassing chamber. 
     
     
       9. The depressurizing device of  claim 1 , wherein the depressurizing valve has an annular groove or a cross-shaped groove. 
     
     
       10. A depressurizing device comprising:
 a valve base having a pressure chamber and an outgassing chamber, wherein top and bottom surfaces of the pressure chamber have an opening and a first valve port respectively, and a bottom surface of the outgassing chamber has a second valve port; 
 a first valve located in the pressure chamber and covering the first valve port; 
 a flexible member disposed on the valve base and having a depressurizing valve and a first outgassing port, the depressurizing valve covering the opening, the first outgassing port being communicated with the outgassing chamber, wherein the valve base has a bottommost surface and an uppermost surface opposite the bottommost surface, the flexible member has a lower surface and an upper surface opposite the lower surface, and a first outgassing channel is defined by a portion of the uppermost surface of the valve base and a portion of the lower surface of the flexible member and communicates the pressure chamber to an outside of the valve base; and 
 a top cover disposed on the flexible member and having a first depressurizing port and a second outgassing port, the first depressurizing port facing the depressurizing valve, and the second outgassing port being communicated with the first outgassing port, wherein the depressurizing valve is configured to deform caused by an effect of atmosphere in the pressure chamber, so as to selectively close the first depressurizing port or leave the first depressurizing port to form a second outgassing channel between the top cover and the flexible member, and the second outgassing channel is communicated with the first depressurizing port and the second outgassing port.